Marc Nieper-Wißkirchen, author of SRFI 161, Unifiable Boxes, has asked me to announce "last call" for this SRFI.  He believes that it is ready for finalization, but would like to give reviewers one last chance to submit corrections and feedback before we finalize it.

  https://srfi.schemers.org/srfi-161

In particular, I appeal to anyone reading this to try the sample implementation, run the tests, and send feedback about your results.

If you're interested in this SRFI, please give your feedback via the SRFI 161 mailing list before 2019/1/14.  After that, assuming that no major revisions are required, we will declare it final.

Regards,

SRFI Editor